fix(python3): add support. skindeep changes for #59

[dudymas]

This has been lightly tested, and will hopefully foster discussion. I'm doing a spike for adding tracing to our team's django app with Jaeger and Python3 .

I'd like to merge this in, but please understand I'm only doing this to get around opentracing-contrib/python-django#7 . I have another PR (to another PR) for that issue:
opentracing-contrib/python-django#6
granduke/python-django#1 (this is the changes I've made to add python3 support and such)

[coveralls]

Coverage increased (+0.01%) to 94.264% when pulling fc615e8 on dudymas:master into 988086b on jaegertracing:master.

[yurishkuro]

most of these changes are to auto-generated files. How did you do that, manually?

[dudymas]

Yeah! ooph... I thought 0.9 wasn't working for python 3. I just checked, and 0.10.0 is available. one min while I test it out, then I'll update the branch. woah nelly... it changed a lot of the generated code!

[dudymas]

Unfortunately, the 0.10.0 version of thrift seems to break functionality. And it also appears that it would require updates to the jaeger service...?
So that's a no go. The easiest solution, if you don't approve of the manual edits, would be to run a sed script after the thrift generation is done. Thoughts? That'd be easy to whip up...

[yurishkuro]

iirc (based on #59) at runtime you can use Py3 with thrift-.10 while the classes are still generated by 0.9.3, but yes they do need to be fixed up a bit (see #59 (comment)). If fixer-upper can be done with sed or otherwise automated then I am not against doing that.

[dudymas]

Okay, see what you think. I found that sed on osx will break with linux unless I add a backup extension... thus I just went ahead and added that. Should work fine on all major three: mac/linux/wsl

[coveralls]

Coverage increased (+0.01%) to 94.264% when pulling 5e6e659 on dudymas:master into 988086b on jaegertracing:master.

[coveralls]

Coverage increased (+0.01%) to 94.264% when pulling 5e6e659 on dudymas:master into 988086b on jaegertracing:master.

[yurishkuro]

lgtm. Could you please rebase off master so that the build is green?

[dudymas]

rebased \o/ woohoo.

[coveralls]

Coverage increased (+0.01%) to 94.264% when pulling d7a84a6 on dudymas:master into 2f780af on jaegertracing:master.